亚硝酸盐对厌氧氨氧化的影响研究

Effects on performance of ANAMMOX process by Nitrite

以二沉池出水为原水,探讨了亚硝酸盐浓度对厌氧氨氧化生物膜滤池性能的影响。实验结果显示,亚硝酸盐浓度的提高有利于加快ANAMMOX反应速率,当NO2--N=118.4mg/L时,氨氮转化速率达最高;此后,进一步提高进水中NO2--N浓度,NO2--N对ANAMMOX反应产生了明显的抑制作用,ANAMMOX反应速率逐渐下降,但此时ANAMMOX细菌仍存在较高的活性。试验结果还显示,为获得良好的脱氮效果,进水中适宜的NO2--N∶NH4+-N应为1.3∶1。

An ANAMMOX biofilter was employed to investigate the effects of nitrite on the performance of ANAMMOX process. The results showed that the increase of nitrite concentration was in favor of ammonia removal velocity, and the velocity reached a climax with the nitrite concentration of 118.4 mg/L. Beyond the concentration, the increase of nitrite concentration would inhibit ANAMMOX process. At the same time, the ANAMMOX bacteria still kept a relatively high activity. Moreover, the data indicated that the ratio of influent NO2^＋-N ： NH4^＋-N should be 1.3 ： 1 for excellent total nitrogen removal effect.